Wehadbetternotbotherourprofessorthesedays,forheisawful...
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問題詳情:
We had better not bother our professor these days, for he is awfully busy preparing a report _____ at an international conference next month.
A. being delivered B. to be delivered C. to deliver D. delivered
【回答】
B
知識點:非謂語動詞
題型:選擇題
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